improved traceback error messages

[Søren Hauberg]

tir, 05 08 2008 kl. 22:13 -0400, skrev John W. Eaton:
> With the changes I checked in, it will print:
> 
>   error: operator +: nonconformant arguments (op1 is 2x2, op2 is 4x4)
>   error: called from:
>   error:   /scratch/jwe/build/octave/h.m at line 8, column 9
>   error:   /scratch/jwe/build/octave/g.m at line 6, column 9
>   error:   /scratch/jwe/build/octave/f.m at line 4, column 5

this is great! Thanks for doing this. Attached is a changeset that
changes the error texts in the manual to match the new style.

Søren
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